Product details: Use: racing bike / MTB helmet Lightweight integrally molded EPS + PC bicycle helmet 16 vents bring cool air in and flush warm air out, well ventilated. Soft, removable, washable, antibacterial pads for best comfort. Turning the internal knob adjusts the tightness of the helmet.
Specifications: Color: titanium Material: Outside: inside: EPS, Pc foam, AOB adjuster Unicase technology, more secure and perfect Vent quantity: 16 vents Head circumference: 57 ~ 61cm Head width: 18.5 cm / 7.3 inches, adjustable Item weight: 314g Package List: 1 * Bicycle Helmet